The pre-war PBYs we had around here had those markings. The only thing was the tail markings were different. There was one vertical blue stripe with 13 alternating horizontal stripes. Starting with a red stripe and ending with one.
I wonder if it was a East Coast / West Coast thing. But the "Coasties" at Winter Island had that tail. It also seems that the yellow was sometimes White but I might be wrong. An eightyone year old memory ain't too reliable, as what her face, the gal I'm married to, would tell you.
Now where in heck did I put my glasses?